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<!doctype html><html class=no-js lang=en><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1"><title>Investigation of Hydronium Diffusion in Poly(vinyl alcohol) Hydrogels: A Critical First Step to Describe Acid Transport for Encapsulated Bioremediation - MillironX</title>
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Websites</a></nav></aside><main><section><h5>ACS ES&T Engineering</h5><h2>Investigation of Hydronium Diffusion in Poly(vinyl alcohol) Hydrogels: A Critical First Step to Describe Acid Transport for Encapsulated Bioremediation</h2><h3><small><a href=/people/carson-j.-silsby/ class=card-link><span class="fa-container fa-fw"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M224 256A128 128 0 10224 0a128 128 0 100 256zM448 512 384 304H64L0 512H448z"/></svg></span>
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Carson J. Silsby</a>
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<a href=/people/jonathan-r.-counts/ class=card-link><span class="fa-container fa-fw"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M224 256A128 128 0 10224 0a128 128 0 100 256zM448 512 384 304H64L0 512H448z"/></svg></span>
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Jonathan R. Counts</a>
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<a href=/people/thomas-a.-christensen-ii/ class="card-link
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bolder"><span class="fa-container fa-fw"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M224 256A128 128 0 10224 0a128 128 0 100 256zM448 512 384 304H64L0 512H448z"/></svg></span>
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Thomas A. Christensen II</a>
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<a href=/people/mark-f.-roll/ class=card-link><span class="fa-container fa-fw"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M224 256A128 128 0 10224 0a128 128 0 100 256zM448 512 384 304H64L0 512H448z"/></svg></span>
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Mark F. Roll</a>
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<a href=/people/kristopher-v.-waynant/ class=card-link><span class="fa-container fa-fw"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M224 256A128 128 0 10224 0a128 128 0 100 256zM448 512 384 304H64L0 512H448z"/></svg></span>
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Kristopher v. Waynant</a>
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<a href=/people/james-g.-moberly/ class=card-link><span class="fa-container fa-fw"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M224 256A128 128 0 10224 0a128 128 0 100 256zM448 512 384 304H64L0 512H448z"/></svg></span>
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James G. Moberly</a></small></h3><h4>September 2, 2022</h4><p>Bioremediation of chlorinated aliphatic hydrocarbon-contaminated aquifers can be
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hindered by high contaminant concentrations and acids generated during
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remediation. Encapsulating microbes in hydrogels may provide a protective,
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tunable environment from inhibiting compounds; however, current approaches to
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formulate successful encapsulated systems rely on trial and error rather than
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engineering approaches because fundamental information on mass-transfer
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coefficients is lacking. To address this knowledge gap, hydronium ion
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mass-transfer rates through two commonly used hydrogel materials, poly(vinyl
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alcohol) and alginic acid, under two solidification methods (chemical and
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cryogenic) were measured. Variations in hydrogel crosslinking conditions,
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polymer composition, and solvent ionic strength were investigated to understand
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how each influenced hydronium ion diffusivity. A three-way ANOVA indicated that
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the ionic strength, membrane type, and crosslinking method significantly (<em>p</em> <
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0.001) contributed to changes in hydronium ion mass transfer. Hydronium ion
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diffusion increased with ionic strength, counter to what is observed in
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aqueous-only (no polymer) solutions. Co-occurring mechanisms correlated to
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increased hydronium ion diffusion with ionic strength included an increased
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water fraction within hydrogel matrices and hydrogel contraction. Measured
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diffusion rates determined in this study provide first principal design
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information to further optimize encapsulating hydrogels for bioremediation.</p><a href=https://doi.org/10.1021/acsestengg.2c00107>https://doi.org/10.1021/acsestengg.2c00107</a>
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<iframe src=https://doi.org/10.1021/acsestengg.2c00107 style=width:100%;height:75vh></iframe></section></main></div><footer><img src=/graphics/brandedbull.min.svg height=95rem><p>© 2022 Thomas A. Christensen II<br>Licensed
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